{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12400",
    "entityType": "User",
    "nonce": "0xc464f367e94fe0839c2d128cba9be622424ab8b45d687d33d003daad2a8ff2af",
    "signature": "0x408334797e3762e6f8c0abd5cb1e2eb250cda9f426f1fed0fe3d06265c05aa5e5224a04032e6dd7566b81ac830e505f991427e9c8ef37f25fd412f5c4999dcd71b",
    "signer": "0x198b96a7042c79979F37b43814A878D6aEfd8C2e",
    "userId": "315069263"
  }
}